lean4-htt/tests/bench/sym/meta_simp_2.lean
2026-01-08 00:20:03 +00:00

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import Lean
open Lean Meta
opaque f : Nat → Nat
namespace SimpBench
/-!
## `MetaM` Simplifier benchmarks
-/
def getProofSize (r : Simp.Result) : MetaM Nat := do
(← r.getProof).numObjs
def checkWithKernel (r : Simp.Result) : MetaM Float := do
let p := ShareCommon.shareCommon' (← r.getProof)
let startTime ← IO.monoNanosNow
Meta.checkWithKernel p
let endTime ← IO.monoNanosNow
return (endTime - startTime).toFloat / 1000000.0
def mkSimpContext (config : Simp.Config := {}) : MetaM Simp.Context := do
let s : SimpTheorems := {}
let s ← s.addConst ``Nat.zero_add
let s ← s.addConst ``Nat.add_zero
let config := { config with implicitDefEqProofs := false }
Simp.mkContext config #[s] {}
def simp (e : Expr) : MetaM (Simp.Result × Float) := do
-- let e ← Grind.shareCommon e
let startTime ← IO.monoNanosNow
let (r, _) ← Meta.simp e (← mkSimpContext)
let endTime ← IO.monoNanosNow
-- logInfo e
-- logInfo r.expr
-- check (← r.getProof)
let timeMs := (endTime - startTime).toFloat / 1000000.0
return (r, timeMs)
def ppExample (e : Expr) (info := false) : MetaM Unit := do
forallTelescope e fun _ e => do
IO.println "Example:"
IO.println (← ppExpr e)
IO.println "====>"
let (r, _) ← simp e
IO.println (← ppExpr r.expr)
let h ← r.getProof
IO.println "Proof:"
if info then
logInfo h
else
IO.println (← ppExpr h)
def mkLambdaBench (n : Nat) : MetaM Expr := do
let zero := mkNatLit 0
let one := mkNatLit 1
let rec go (n : Nat) (xs : Array Expr) (e : Expr) : MetaM Expr := do
match n with
| 0 => mkLambdaFVars xs e
| n+1 =>
withLocalDeclD `x (mkConst ``Nat) fun x =>
go n (xs.push x) (mkNatAdd zero (mkNatAdd e (mkNatAdd (mkNatAdd x one) zero)))
go n #[] zero
def benchLambda (n : Nat) (check := false) : MetaM Unit := do
let e ← mkLambdaBench n
let (r, timeMs) ← simp e
let proofSize ← getProofSize r
if check then
let kMs ← checkWithKernel r
IO.println s!"lambda_{n}: {timeMs}ms, kernel: {kMs}ms, proof_size={proofSize}"
else
IO.println s!"lambda_{n}: {timeMs}ms, proof_size={proofSize}"
set_option maxRecDepth 100000
/-! ## Run all benchmarks -/
def runAllBenchmarks : MetaM Unit := do
IO.println "=== Simplifier Lambda Telescope Stress Tests using `Meta.simp` ==="
IO.println ""
IO.println ""
IO.println "--- Benchmark 1: Lambda Telescope block ---"
ppExample (← mkLambdaBench 5)
for n in [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200] do
benchLambda n (n < 500)
#eval runAllBenchmarks
end SimpBench